21587800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1$

素因数の和:90

約数の個数: 144

約数和(自身を含む): 59527440

約数和(自身を除く): 37939640

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 23, 25, 26, 38, 40, 46, 50, 52, 65, 76, 92, 95, 100, 104, 115, 130, 152, 184, 190, 200, 230, 247, 260, 299, 325, 361, 380, 437, 460, 475, 494, 520, 575, 598, 650, 722, 760, 874, 920, 950, 988, 1150, 1196, 1235, 1300, 1444, 1495, 1748, 1805, 1900, 1976, 2185, 2300, 2392, 2470, 2600, 2888, 2990, 3496, 3610, 3800, 4370, 4600, 4693, 4940, 5681, 5980, 6175, 7220, 7475, 8303, 8740, 9025, 9386, 9880, 10925, 11362, 11960, 12350, 14440, 14950, 16606, 17480, 18050, 18772, 21850, 22724, 23465, 24700, 28405, 29900, 33212, 36100, 37544, 41515, 43700, 45448, 46930, 49400, 56810, 59800, 66424, 72200, 83030, 87400, 93860, 107939, 113620, 117325, 142025, 166060, 187720, 207575, 215878, 227240, 234650, 284050, 332120, 415150, 431756, 469300, 539695, 568100, 830300, 863512, 938600, 1079390, 1136200, 1660600, 2158780, 2698475, 4317560, 5396950, 10793900, 21587800]

約数ペア:

[(1, 21587800), (2, 10793900), (4, 5396950), (5, 4317560), (8, 2698475), (10, 2158780), (13, 1660600), (19, 1136200), (20, 1079390), (23, 938600), (25, 863512), (26, 830300), (38, 568100), (40, 539695), (46, 469300), (50, 431756), (52, 415150), (65, 332120), (76, 284050), (92, 234650), (95, 227240), (100, 215878), (104, 207575), (115, 187720), (130, 166060), (152, 142025), (184, 117325), (190, 113620), (200, 107939), (230, 93860), (247, 87400), (260, 83030), (299, 72200), (325, 66424), (361, 59800), (380, 56810), (437, 49400), (460, 46930), (475, 45448), (494, 43700), (520, 41515), (575, 37544), (598, 36100), (650, 33212), (722, 29900), (760, 28405), (874, 24700), (920, 23465), (950, 22724), (988, 21850), (1150, 18772), (1196, 18050), (1235, 17480), (1300, 16606), (1444, 14950), (1495, 14440), (1748, 12350), (1805, 11960), (1900, 11362), (1976, 10925), (2185, 9880), (2300, 9386), (2392, 9025), (2470, 8740), (2600, 8303), (2888, 7475), (2990, 7220), (3496, 6175), (3610, 5980), (3800, 5681), (4370, 4940), (4600, 4693)]