21269968

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:156

約数の個数: 80

約数和(自身を含む): 46743040

約数和(自身を除く): 25473072

約数列:

[1, 2, 4, 8, 16, 19, 31, 37, 38, 61, 62, 74, 76, 122, 124, 148, 152, 244, 248, 296, 304, 488, 496, 589, 592, 703, 976, 1147, 1159, 1178, 1406, 1891, 2257, 2294, 2318, 2356, 2812, 3782, 4514, 4588, 4636, 4712, 5624, 7564, 9028, 9176, 9272, 9424, 11248, 15128, 18056, 18352, 18544, 21793, 30256, 35929, 36112, 42883, 43586, 69967, 71858, 85766, 87172, 139934, 143716, 171532, 174344, 279868, 287432, 343064, 348688, 559736, 574864, 686128, 1119472, 1329373, 2658746, 5317492, 10634984, 21269968]

約数ペア:

[(1, 21269968), (2, 10634984), (4, 5317492), (8, 2658746), (16, 1329373), (19, 1119472), (31, 686128), (37, 574864), (38, 559736), (61, 348688), (62, 343064), (74, 287432), (76, 279868), (122, 174344), (124, 171532), (148, 143716), (152, 139934), (244, 87172), (248, 85766), (296, 71858), (304, 69967), (488, 43586), (496, 42883), (589, 36112), (592, 35929), (703, 30256), (976, 21793), (1147, 18544), (1159, 18352), (1178, 18056), (1406, 15128), (1891, 11248), (2257, 9424), (2294, 9272), (2318, 9176), (2356, 9028), (2812, 7564), (3782, 5624), (4514, 4712), (4588, 4636)]