18789784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 41176800

約数和(自身を除く): 22387016

約数列:

[1, 2, 4, 8, 13, 19, 26, 37, 38, 52, 74, 76, 104, 148, 152, 247, 257, 296, 481, 494, 514, 703, 962, 988, 1028, 1406, 1924, 1976, 2056, 2812, 3341, 3848, 4883, 5624, 6682, 9139, 9509, 9766, 13364, 18278, 19018, 19532, 26728, 36556, 38036, 39064, 63479, 73112, 76072, 123617, 126958, 180671, 247234, 253916, 361342, 494468, 507832, 722684, 988936, 1445368, 2348723, 4697446, 9394892, 18789784]

約数ペア:

[(1, 18789784), (2, 9394892), (4, 4697446), (8, 2348723), (13, 1445368), (19, 988936), (26, 722684), (37, 507832), (38, 494468), (52, 361342), (74, 253916), (76, 247234), (104, 180671), (148, 126958), (152, 123617), (247, 76072), (257, 73112), (296, 63479), (481, 39064), (494, 38036), (514, 36556), (703, 26728), (962, 19532), (988, 19018), (1028, 18278), (1406, 13364), (1924, 9766), (1976, 9509), (2056, 9139), (2812, 6682), (3341, 5624), (3848, 4883)]