20835780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{373}}^1$

素因数の和:418

約数の個数: 144

約数和(自身を含む): 71628480

約数和(自身を除く): 50792700

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 49, 57, 60, 70, 76, 84, 95, 98, 105, 114, 133, 140, 147, 190, 196, 210, 228, 245, 266, 285, 294, 373, 380, 399, 420, 490, 532, 570, 588, 665, 735, 746, 798, 931, 980, 1119, 1140, 1330, 1470, 1492, 1596, 1862, 1865, 1995, 2238, 2611, 2660, 2793, 2940, 3724, 3730, 3990, 4476, 4655, 5222, 5586, 5595, 7087, 7460, 7833, 7980, 9310, 10444, 11172, 11190, 13055, 13965, 14174, 15666, 18277, 18620, 21261, 22380, 26110, 27930, 28348, 31332, 35435, 36554, 39165, 42522, 49609, 52220, 54831, 55860, 70870, 73108, 78330, 85044, 91385, 99218, 106305, 109662, 141740, 148827, 156660, 182770, 198436, 212610, 219324, 248045, 274155, 297654, 347263, 365540, 425220, 496090, 548310, 595308, 694526, 744135, 992180, 1041789, 1096620, 1389052, 1488270, 1736315, 2083578, 2976540, 3472630, 4167156, 5208945, 6945260, 10417890, 20835780]

約数ペア:

[(1, 20835780), (2, 10417890), (3, 6945260), (4, 5208945), (5, 4167156), (6, 3472630), (7, 2976540), (10, 2083578), (12, 1736315), (14, 1488270), (15, 1389052), (19, 1096620), (20, 1041789), (21, 992180), (28, 744135), (30, 694526), (35, 595308), (38, 548310), (42, 496090), (49, 425220), (57, 365540), (60, 347263), (70, 297654), (76, 274155), (84, 248045), (95, 219324), (98, 212610), (105, 198436), (114, 182770), (133, 156660), (140, 148827), (147, 141740), (190, 109662), (196, 106305), (210, 99218), (228, 91385), (245, 85044), (266, 78330), (285, 73108), (294, 70870), (373, 55860), (380, 54831), (399, 52220), (420, 49609), (490, 42522), (532, 39165), (570, 36554), (588, 35435), (665, 31332), (735, 28348), (746, 27930), (798, 26110), (931, 22380), (980, 21261), (1119, 18620), (1140, 18277), (1330, 15666), (1470, 14174), (1492, 13965), (1596, 13055), (1862, 11190), (1865, 11172), (1995, 10444), (2238, 9310), (2611, 7980), (2660, 7833), (2793, 7460), (2940, 7087), (3724, 5595), (3730, 5586), (3990, 5222), (4476, 4655)]