21248656

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 49871808

約数和(自身を除く): 28623152

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 37, 44, 52, 74, 88, 104, 143, 148, 176, 208, 251, 286, 296, 407, 481, 502, 572, 592, 814, 962, 1004, 1144, 1628, 1924, 2008, 2288, 2761, 3256, 3263, 3848, 4016, 5291, 5522, 6512, 6526, 7696, 9287, 10582, 11044, 13052, 18574, 21164, 22088, 26104, 35893, 37148, 42328, 44176, 52208, 71786, 74296, 84656, 102157, 120731, 143572, 148592, 204314, 241462, 287144, 408628, 482924, 574288, 817256, 965848, 1328041, 1634512, 1931696, 2656082, 5312164, 10624328, 21248656]

約数ペア:

[(1, 21248656), (2, 10624328), (4, 5312164), (8, 2656082), (11, 1931696), (13, 1634512), (16, 1328041), (22, 965848), (26, 817256), (37, 574288), (44, 482924), (52, 408628), (74, 287144), (88, 241462), (104, 204314), (143, 148592), (148, 143572), (176, 120731), (208, 102157), (251, 84656), (286, 74296), (296, 71786), (407, 52208), (481, 44176), (502, 42328), (572, 37148), (592, 35893), (814, 26104), (962, 22088), (1004, 21164), (1144, 18574), (1628, 13052), (1924, 11044), (2008, 10582), (2288, 9287), (2761, 7696), (3256, 6526), (3263, 6512), (3848, 5522), (4016, 5291)]