21143240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:135

約数の個数: 96

約数和(自身を含む): 53049600

約数和(自身を除く): 31906360

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 31, 34, 40, 59, 62, 68, 85, 118, 124, 136, 155, 170, 236, 248, 289, 295, 310, 340, 472, 527, 578, 590, 620, 680, 1003, 1054, 1156, 1180, 1240, 1445, 1829, 2006, 2108, 2312, 2360, 2635, 2890, 3658, 4012, 4216, 5015, 5270, 5780, 7316, 8024, 8959, 9145, 10030, 10540, 11560, 14632, 17051, 17918, 18290, 20060, 21080, 31093, 34102, 35836, 36580, 40120, 44795, 62186, 68204, 71672, 73160, 85255, 89590, 124372, 136408, 155465, 170510, 179180, 248744, 310930, 341020, 358360, 528581, 621860, 682040, 1057162, 1243720, 2114324, 2642905, 4228648, 5285810, 10571620, 21143240]

約数ペア:

[(1, 21143240), (2, 10571620), (4, 5285810), (5, 4228648), (8, 2642905), (10, 2114324), (17, 1243720), (20, 1057162), (31, 682040), (34, 621860), (40, 528581), (59, 358360), (62, 341020), (68, 310930), (85, 248744), (118, 179180), (124, 170510), (136, 155465), (155, 136408), (170, 124372), (236, 89590), (248, 85255), (289, 73160), (295, 71672), (310, 68204), (340, 62186), (472, 44795), (527, 40120), (578, 36580), (590, 35836), (620, 34102), (680, 31093), (1003, 21080), (1054, 20060), (1156, 18290), (1180, 17918), (1240, 17051), (1445, 14632), (1829, 11560), (2006, 10540), (2108, 10030), (2312, 9145), (2360, 8959), (2635, 8024), (2890, 7316), (3658, 5780), (4012, 5270), (4216, 5015)]