21610980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 70761600

約数和(自身を除く): 49150620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 30, 36, 38, 45, 57, 60, 71, 76, 89, 90, 95, 114, 142, 171, 178, 180, 190, 213, 228, 267, 284, 285, 342, 355, 356, 380, 426, 445, 534, 570, 639, 684, 710, 801, 852, 855, 890, 1065, 1068, 1140, 1278, 1335, 1349, 1420, 1602, 1691, 1710, 1780, 2130, 2556, 2670, 2698, 3195, 3204, 3382, 3420, 4005, 4047, 4260, 5073, 5340, 5396, 6319, 6390, 6745, 6764, 8010, 8094, 8455, 10146, 12141, 12638, 12780, 13490, 15219, 16020, 16188, 16910, 18957, 20235, 20292, 24282, 25276, 25365, 26980, 30438, 31595, 33820, 37914, 40470, 48564, 50730, 56871, 60705, 60876, 63190, 75828, 76095, 80940, 94785, 101460, 113742, 120061, 121410, 126380, 152190, 189570, 227484, 240122, 242820, 284355, 304380, 360183, 379140, 480244, 568710, 600305, 720366, 1080549, 1137420, 1200610, 1440732, 1800915, 2161098, 2401220, 3601830, 4322196, 5402745, 7203660, 10805490, 21610980]

約数ペア:

[(1, 21610980), (2, 10805490), (3, 7203660), (4, 5402745), (5, 4322196), (6, 3601830), (9, 2401220), (10, 2161098), (12, 1800915), (15, 1440732), (18, 1200610), (19, 1137420), (20, 1080549), (30, 720366), (36, 600305), (38, 568710), (45, 480244), (57, 379140), (60, 360183), (71, 304380), (76, 284355), (89, 242820), (90, 240122), (95, 227484), (114, 189570), (142, 152190), (171, 126380), (178, 121410), (180, 120061), (190, 113742), (213, 101460), (228, 94785), (267, 80940), (284, 76095), (285, 75828), (342, 63190), (355, 60876), (356, 60705), (380, 56871), (426, 50730), (445, 48564), (534, 40470), (570, 37914), (639, 33820), (684, 31595), (710, 30438), (801, 26980), (852, 25365), (855, 25276), (890, 24282), (1065, 20292), (1068, 20235), (1140, 18957), (1278, 16910), (1335, 16188), (1349, 16020), (1420, 15219), (1602, 13490), (1691, 12780), (1710, 12638), (1780, 12141), (2130, 10146), (2556, 8455), (2670, 8094), (2698, 8010), (3195, 6764), (3204, 6745), (3382, 6390), (3420, 6319), (4005, 5396), (4047, 5340), (4260, 5073)]