21502960

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{163}}^1$

素因数の和:290

約数の個数: 80

約数和(自身を含む): 53809056

約数和(自身を除く): 32306096

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 97, 136, 163, 170, 194, 272, 326, 340, 388, 485, 652, 680, 776, 815, 970, 1304, 1360, 1552, 1630, 1649, 1940, 2608, 2771, 3260, 3298, 3880, 5542, 6520, 6596, 7760, 8245, 11084, 13040, 13192, 13855, 15811, 16490, 22168, 26384, 27710, 31622, 32980, 44336, 55420, 63244, 65960, 79055, 110840, 126488, 131920, 158110, 221680, 252976, 268787, 316220, 537574, 632440, 1075148, 1264880, 1343935, 2150296, 2687870, 4300592, 5375740, 10751480, 21502960]

約数ペア:

[(1, 21502960), (2, 10751480), (4, 5375740), (5, 4300592), (8, 2687870), (10, 2150296), (16, 1343935), (17, 1264880), (20, 1075148), (34, 632440), (40, 537574), (68, 316220), (80, 268787), (85, 252976), (97, 221680), (136, 158110), (163, 131920), (170, 126488), (194, 110840), (272, 79055), (326, 65960), (340, 63244), (388, 55420), (485, 44336), (652, 32980), (680, 31622), (776, 27710), (815, 26384), (970, 22168), (1304, 16490), (1360, 15811), (1552, 13855), (1630, 13192), (1649, 13040), (1940, 11084), (2608, 8245), (2771, 7760), (3260, 6596), (3298, 6520), (3880, 5542)]