21787376

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{149}}^1$

素因数の和:226

約数の個数: 80

約数和(自身を含む): 49476000

約数和(自身を除く): 27688624

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 37, 38, 52, 74, 76, 104, 148, 149, 152, 208, 247, 296, 298, 304, 481, 494, 592, 596, 703, 962, 988, 1192, 1406, 1924, 1937, 1976, 2384, 2812, 2831, 3848, 3874, 3952, 5513, 5624, 5662, 7696, 7748, 9139, 11026, 11248, 11324, 15496, 18278, 22052, 22648, 30992, 36556, 36803, 44104, 45296, 71669, 73112, 73606, 88208, 104747, 143338, 146224, 147212, 209494, 286676, 294424, 418988, 573352, 588848, 837976, 1146704, 1361711, 1675952, 2723422, 5446844, 10893688, 21787376]

約数ペア:

[(1, 21787376), (2, 10893688), (4, 5446844), (8, 2723422), (13, 1675952), (16, 1361711), (19, 1146704), (26, 837976), (37, 588848), (38, 573352), (52, 418988), (74, 294424), (76, 286676), (104, 209494), (148, 147212), (149, 146224), (152, 143338), (208, 104747), (247, 88208), (296, 73606), (298, 73112), (304, 71669), (481, 45296), (494, 44104), (592, 36803), (596, 36556), (703, 30992), (962, 22648), (988, 22052), (1192, 18278), (1406, 15496), (1924, 11324), (1937, 11248), (1976, 11026), (2384, 9139), (2812, 7748), (2831, 7696), (3848, 5662), (3874, 5624), (3952, 5513)]