21341216

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{61}}^1$

素因数の和:142

約数の個数: 72

約数和(自身を含む): 47629764

約数和(自身を除く): 26288548

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 32, 52, 58, 61, 104, 116, 122, 208, 232, 244, 377, 416, 464, 488, 754, 793, 841, 928, 976, 1508, 1586, 1682, 1769, 1952, 3016, 3172, 3364, 3538, 6032, 6344, 6728, 7076, 10933, 12064, 12688, 13456, 14152, 21866, 22997, 25376, 26912, 28304, 43732, 45994, 51301, 56608, 87464, 91988, 102602, 174928, 183976, 205204, 349856, 367952, 410408, 666913, 735904, 820816, 1333826, 1641632, 2667652, 5335304, 10670608, 21341216]

約数ペア:

[(1, 21341216), (2, 10670608), (4, 5335304), (8, 2667652), (13, 1641632), (16, 1333826), (26, 820816), (29, 735904), (32, 666913), (52, 410408), (58, 367952), (61, 349856), (104, 205204), (116, 183976), (122, 174928), (208, 102602), (232, 91988), (244, 87464), (377, 56608), (416, 51301), (464, 45994), (488, 43732), (754, 28304), (793, 26912), (841, 25376), (928, 22997), (976, 21866), (1508, 14152), (1586, 13456), (1682, 12688), (1769, 12064), (1952, 10933), (3016, 7076), (3172, 6728), (3364, 6344), (3538, 6032)]