21878766

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{37}}^1$

素因数の和:103

約数の個数: 144

約数和(自身を含む): 63239904

約数和(自身を除く): 41361138

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 19, 21, 26, 37, 38, 39, 42, 57, 63, 74, 78, 91, 111, 114, 117, 126, 133, 171, 182, 222, 234, 247, 259, 266, 273, 333, 342, 361, 399, 481, 494, 518, 546, 666, 703, 722, 741, 777, 798, 819, 962, 1083, 1197, 1406, 1443, 1482, 1554, 1638, 1729, 2109, 2166, 2223, 2331, 2394, 2527, 2886, 3249, 3367, 3458, 4218, 4329, 4446, 4662, 4693, 4921, 5054, 5187, 6327, 6498, 6734, 7581, 8658, 9139, 9386, 9842, 10101, 10374, 12654, 13357, 14079, 14763, 15162, 15561, 18278, 20202, 22743, 26714, 27417, 28158, 29526, 30303, 31122, 32851, 40071, 42237, 44289, 45486, 54834, 60606, 63973, 65702, 80142, 82251, 84474, 88578, 93499, 98553, 120213, 127946, 164502, 173641, 186998, 191919, 197106, 240426, 280497, 295659, 347282, 383838, 520923, 560994, 575757, 591318, 841491, 1041846, 1151514, 1215487, 1562769, 1682982, 2430974, 3125538, 3646461, 7292922, 10939383, 21878766]

約数ペア:

[(1, 21878766), (2, 10939383), (3, 7292922), (6, 3646461), (7, 3125538), (9, 2430974), (13, 1682982), (14, 1562769), (18, 1215487), (19, 1151514), (21, 1041846), (26, 841491), (37, 591318), (38, 575757), (39, 560994), (42, 520923), (57, 383838), (63, 347282), (74, 295659), (78, 280497), (91, 240426), (111, 197106), (114, 191919), (117, 186998), (126, 173641), (133, 164502), (171, 127946), (182, 120213), (222, 98553), (234, 93499), (247, 88578), (259, 84474), (266, 82251), (273, 80142), (333, 65702), (342, 63973), (361, 60606), (399, 54834), (481, 45486), (494, 44289), (518, 42237), (546, 40071), (666, 32851), (703, 31122), (722, 30303), (741, 29526), (777, 28158), (798, 27417), (819, 26714), (962, 22743), (1083, 20202), (1197, 18278), (1406, 15561), (1443, 15162), (1482, 14763), (1554, 14079), (1638, 13357), (1729, 12654), (2109, 10374), (2166, 10101), (2223, 9842), (2331, 9386), (2394, 9139), (2527, 8658), (2886, 7581), (3249, 6734), (3367, 6498), (3458, 6327), (4218, 5187), (4329, 5054), (4446, 4921), (4662, 4693)]