19888980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1$

素因数の和:114

約数の個数: 144

約数和(自身を含む): 62716416

約数和(自身を除く): 42827436

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 31, 34, 37, 51, 60, 62, 68, 74, 85, 93, 102, 111, 124, 148, 155, 170, 185, 186, 204, 222, 255, 289, 310, 340, 370, 372, 444, 465, 510, 527, 555, 578, 620, 629, 740, 867, 930, 1020, 1054, 1110, 1147, 1156, 1258, 1445, 1581, 1734, 1860, 1887, 2108, 2220, 2294, 2516, 2635, 2890, 3145, 3162, 3441, 3468, 3774, 4335, 4588, 5270, 5735, 5780, 6290, 6324, 6882, 7548, 7905, 8670, 8959, 9435, 10540, 10693, 11470, 12580, 13764, 15810, 17205, 17340, 17918, 18870, 19499, 21386, 22940, 26877, 31620, 32079, 34410, 35836, 37740, 38998, 42772, 44795, 53465, 53754, 58497, 64158, 68820, 77996, 89590, 97495, 106930, 107508, 116994, 128316, 134385, 160395, 179180, 194990, 213860, 233988, 268770, 292485, 320790, 331483, 389980, 537540, 584970, 641580, 662966, 994449, 1169940, 1325932, 1657415, 1988898, 3314830, 3977796, 4972245, 6629660, 9944490, 19888980]

約数ペア:

[(1, 19888980), (2, 9944490), (3, 6629660), (4, 4972245), (5, 3977796), (6, 3314830), (10, 1988898), (12, 1657415), (15, 1325932), (17, 1169940), (20, 994449), (30, 662966), (31, 641580), (34, 584970), (37, 537540), (51, 389980), (60, 331483), (62, 320790), (68, 292485), (74, 268770), (85, 233988), (93, 213860), (102, 194990), (111, 179180), (124, 160395), (148, 134385), (155, 128316), (170, 116994), (185, 107508), (186, 106930), (204, 97495), (222, 89590), (255, 77996), (289, 68820), (310, 64158), (340, 58497), (370, 53754), (372, 53465), (444, 44795), (465, 42772), (510, 38998), (527, 37740), (555, 35836), (578, 34410), (620, 32079), (629, 31620), (740, 26877), (867, 22940), (930, 21386), (1020, 19499), (1054, 18870), (1110, 17918), (1147, 17340), (1156, 17205), (1258, 15810), (1445, 13764), (1581, 12580), (1734, 11470), (1860, 10693), (1887, 10540), (2108, 9435), (2220, 8959), (2294, 8670), (2516, 7905), (2635, 7548), (2890, 6882), (3145, 6324), (3162, 6290), (3441, 5780), (3468, 5735), (3774, 5270), (4335, 4588)]