21339760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1$

素因数の和:131

約数の個数: 120

約数和(自身を含む): 57558816

約数和(自身を除く): 36219056

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 71, 80, 85, 104, 130, 136, 142, 170, 208, 221, 260, 272, 284, 289, 340, 355, 442, 520, 568, 578, 680, 710, 884, 923, 1040, 1105, 1136, 1156, 1207, 1360, 1420, 1445, 1768, 1846, 2210, 2312, 2414, 2840, 2890, 3536, 3692, 3757, 4420, 4615, 4624, 4828, 5680, 5780, 6035, 7384, 7514, 8840, 9230, 9656, 11560, 12070, 14768, 15028, 15691, 17680, 18460, 18785, 19312, 20519, 23120, 24140, 30056, 31382, 36920, 37570, 41038, 48280, 60112, 62764, 73840, 75140, 78455, 82076, 96560, 102595, 125528, 150280, 156910, 164152, 205190, 251056, 266747, 300560, 313820, 328304, 410380, 533494, 627640, 820760, 1066988, 1255280, 1333735, 1641520, 2133976, 2667470, 4267952, 5334940, 10669880, 21339760]

約数ペア:

[(1, 21339760), (2, 10669880), (4, 5334940), (5, 4267952), (8, 2667470), (10, 2133976), (13, 1641520), (16, 1333735), (17, 1255280), (20, 1066988), (26, 820760), (34, 627640), (40, 533494), (52, 410380), (65, 328304), (68, 313820), (71, 300560), (80, 266747), (85, 251056), (104, 205190), (130, 164152), (136, 156910), (142, 150280), (170, 125528), (208, 102595), (221, 96560), (260, 82076), (272, 78455), (284, 75140), (289, 73840), (340, 62764), (355, 60112), (442, 48280), (520, 41038), (568, 37570), (578, 36920), (680, 31382), (710, 30056), (884, 24140), (923, 23120), (1040, 20519), (1105, 19312), (1136, 18785), (1156, 18460), (1207, 17680), (1360, 15691), (1420, 15028), (1445, 14768), (1768, 12070), (1846, 11560), (2210, 9656), (2312, 9230), (2414, 8840), (2840, 7514), (2890, 7384), (3536, 6035), (3692, 5780), (3757, 5680), (4420, 4828), (4615, 4624)]