21547890

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{877}}^1$

素因数の和:913

約数の個数: 128

約数和(自身を含む): 70801920

約数和(自身を除く): 49254030

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 27, 30, 35, 39, 42, 45, 54, 63, 65, 70, 78, 90, 91, 105, 117, 126, 130, 135, 182, 189, 195, 210, 234, 270, 273, 315, 351, 378, 390, 455, 546, 585, 630, 702, 819, 877, 910, 945, 1170, 1365, 1638, 1754, 1755, 1890, 2457, 2631, 2730, 3510, 4095, 4385, 4914, 5262, 6139, 7893, 8190, 8770, 11401, 12278, 12285, 13155, 15786, 18417, 22802, 23679, 24570, 26310, 30695, 34203, 36834, 39465, 47358, 55251, 57005, 61390, 68406, 78930, 79807, 92085, 102609, 110502, 114010, 118395, 159614, 165753, 171015, 184170, 205218, 236790, 239421, 276255, 307827, 331506, 342030, 399035, 478842, 513045, 552510, 615654, 718263, 798070, 828765, 1026090, 1197105, 1436526, 1539135, 1657530, 2154789, 2394210, 3078270, 3591315, 4309578, 7182630, 10773945, 21547890]

約数ペア:

[(1, 21547890), (2, 10773945), (3, 7182630), (5, 4309578), (6, 3591315), (7, 3078270), (9, 2394210), (10, 2154789), (13, 1657530), (14, 1539135), (15, 1436526), (18, 1197105), (21, 1026090), (26, 828765), (27, 798070), (30, 718263), (35, 615654), (39, 552510), (42, 513045), (45, 478842), (54, 399035), (63, 342030), (65, 331506), (70, 307827), (78, 276255), (90, 239421), (91, 236790), (105, 205218), (117, 184170), (126, 171015), (130, 165753), (135, 159614), (182, 118395), (189, 114010), (195, 110502), (210, 102609), (234, 92085), (270, 79807), (273, 78930), (315, 68406), (351, 61390), (378, 57005), (390, 55251), (455, 47358), (546, 39465), (585, 36834), (630, 34203), (702, 30695), (819, 26310), (877, 24570), (910, 23679), (945, 22802), (1170, 18417), (1365, 15786), (1638, 13155), (1754, 12285), (1755, 12278), (1890, 11401), (2457, 8770), (2631, 8190), (2730, 7893), (3510, 6139), (4095, 5262), (4385, 4914)]