646976980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{61}}^1\times {\mathrm{113}}^1$

素因数の和:234

約数の個数: 144

約数和(自身を含む): 1583429904

約数和(自身を除く): 936452924

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 61, 65, 76, 95, 113, 122, 130, 190, 226, 244, 247, 260, 305, 361, 380, 452, 494, 565, 610, 722, 793, 988, 1130, 1159, 1220, 1235, 1444, 1469, 1586, 1805, 2147, 2260, 2318, 2470, 2938, 3172, 3610, 3965, 4294, 4636, 4693, 4940, 5795, 5876, 6893, 7220, 7345, 7930, 8588, 9386, 10735, 11590, 13786, 14690, 15067, 15860, 18772, 21470, 22021, 23180, 23465, 27572, 27911, 29380, 30134, 34465, 40793, 42940, 44042, 46930, 55822, 60268, 68930, 75335, 81586, 88084, 89609, 93860, 110105, 111644, 130967, 137860, 139555, 150670, 163172, 179218, 203965, 220210, 261934, 279110, 286273, 301340, 358436, 407930, 440420, 448045, 523868, 530309, 558220, 572546, 654835, 815860, 896090, 1060618, 1145092, 1309670, 1431365, 1702571, 1792180, 2121236, 2488373, 2619340, 2651545, 2862730, 3405142, 4976746, 5303090, 5725460, 6810284, 8512855, 9953492, 10606180, 12441865, 17025710, 24883730, 32348849, 34051420, 49767460, 64697698, 129395396, 161744245, 323488490, 646976980]

約数ペア:

[(1, 646976980), (2, 323488490), (4, 161744245), (5, 129395396), (10, 64697698), (13, 49767460), (19, 34051420), (20, 32348849), (26, 24883730), (38, 17025710), (52, 12441865), (61, 10606180), (65, 9953492), (76, 8512855), (95, 6810284), (113, 5725460), (122, 5303090), (130, 4976746), (190, 3405142), (226, 2862730), (244, 2651545), (247, 2619340), (260, 2488373), (305, 2121236), (361, 1792180), (380, 1702571), (452, 1431365), (494, 1309670), (565, 1145092), (610, 1060618), (722, 896090), (793, 815860), (988, 654835), (1130, 572546), (1159, 558220), (1220, 530309), (1235, 523868), (1444, 448045), (1469, 440420), (1586, 407930), (1805, 358436), (2147, 301340), (2260, 286273), (2318, 279110), (2470, 261934), (2938, 220210), (3172, 203965), (3610, 179218), (3965, 163172), (4294, 150670), (4636, 139555), (4693, 137860), (4940, 130967), (5795, 111644), (5876, 110105), (6893, 93860), (7220, 89609), (7345, 88084), (7930, 81586), (8588, 75335), (9386, 68930), (10735, 60268), (11590, 55822), (13786, 46930), (14690, 44042), (15067, 42940), (15860, 40793), (18772, 34465), (21470, 30134), (22021, 29380), (23180, 27911), (23465, 27572)]