21980960

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:178

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33176800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 47, 74, 79, 80, 94, 148, 158, 160, 185, 188, 235, 296, 316, 370, 376, 395, 470, 592, 632, 740, 752, 790, 940, 1184, 1264, 1480, 1504, 1580, 1739, 1880, 2528, 2923, 2960, 3160, 3478, 3713, 3760, 5846, 5920, 6320, 6956, 7426, 7520, 8695, 11692, 12640, 13912, 14615, 14852, 17390, 18565, 23384, 27824, 29230, 29704, 34780, 37130, 46768, 55648, 58460, 59408, 69560, 74260, 93536, 116920, 118816, 137381, 139120, 148520, 233840, 274762, 278240, 297040, 467680, 549524, 594080, 686905, 1099048, 1373810, 2198096, 2747620, 4396192, 5495240, 10990480, 21980960]

約数ペア:

[(1, 21980960), (2, 10990480), (4, 5495240), (5, 4396192), (8, 2747620), (10, 2198096), (16, 1373810), (20, 1099048), (32, 686905), (37, 594080), (40, 549524), (47, 467680), (74, 297040), (79, 278240), (80, 274762), (94, 233840), (148, 148520), (158, 139120), (160, 137381), (185, 118816), (188, 116920), (235, 93536), (296, 74260), (316, 69560), (370, 59408), (376, 58460), (395, 55648), (470, 46768), (592, 37130), (632, 34780), (740, 29704), (752, 29230), (790, 27824), (940, 23384), (1184, 18565), (1264, 17390), (1480, 14852), (1504, 14615), (1580, 13912), (1739, 12640), (1880, 11692), (2528, 8695), (2923, 7520), (2960, 7426), (3160, 6956), (3478, 6320), (3713, 5920), (3760, 5846)]