21680360

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{241}}^1$

素因数の和:438

約数の個数: 64

約数和(自身を含む): 53056080

約数和(自身を除く): 31375720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 173, 241, 260, 346, 482, 520, 692, 865, 964, 1205, 1384, 1730, 1928, 2249, 2410, 3133, 3460, 4498, 4820, 6266, 6920, 8996, 9640, 11245, 12532, 15665, 17992, 22490, 25064, 31330, 41693, 44980, 62660, 83386, 89960, 125320, 166772, 208465, 333544, 416930, 542009, 833860, 1084018, 1667720, 2168036, 2710045, 4336072, 5420090, 10840180, 21680360]

約数ペア:

[(1, 21680360), (2, 10840180), (4, 5420090), (5, 4336072), (8, 2710045), (10, 2168036), (13, 1667720), (20, 1084018), (26, 833860), (40, 542009), (52, 416930), (65, 333544), (104, 208465), (130, 166772), (173, 125320), (241, 89960), (260, 83386), (346, 62660), (482, 44980), (520, 41693), (692, 31330), (865, 25064), (964, 22490), (1205, 17992), (1384, 15665), (1730, 12532), (1928, 11245), (2249, 9640), (2410, 8996), (3133, 6920), (3460, 6266), (4498, 4820)]