21288800

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:145

約数の個数: 144

約数和(自身を含む): 59058720

約数和(自身を除く): 37769920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 25, 26, 32, 40, 46, 50, 52, 65, 80, 89, 92, 100, 104, 115, 130, 160, 178, 184, 200, 208, 230, 260, 299, 325, 356, 368, 400, 416, 445, 460, 520, 575, 598, 650, 712, 736, 800, 890, 920, 1040, 1150, 1157, 1196, 1300, 1424, 1495, 1780, 1840, 2047, 2080, 2225, 2300, 2314, 2392, 2600, 2848, 2990, 3560, 3680, 4094, 4450, 4600, 4628, 4784, 5200, 5785, 5980, 7120, 7475, 8188, 8900, 9200, 9256, 9568, 10235, 10400, 11570, 11960, 14240, 14950, 16376, 17800, 18400, 18512, 20470, 23140, 23920, 26611, 28925, 29900, 32752, 35600, 37024, 40940, 46280, 47840, 51175, 53222, 57850, 59800, 65504, 71200, 81880, 92560, 102350, 106444, 115700, 119600, 133055, 163760, 185120, 204700, 212888, 231400, 239200, 266110, 327520, 409400, 425776, 462800, 532220, 665275, 818800, 851552, 925600, 1064440, 1330550, 1637600, 2128880, 2661100, 4257760, 5322200, 10644400, 21288800]

約数ペア:

[(1, 21288800), (2, 10644400), (4, 5322200), (5, 4257760), (8, 2661100), (10, 2128880), (13, 1637600), (16, 1330550), (20, 1064440), (23, 925600), (25, 851552), (26, 818800), (32, 665275), (40, 532220), (46, 462800), (50, 425776), (52, 409400), (65, 327520), (80, 266110), (89, 239200), (92, 231400), (100, 212888), (104, 204700), (115, 185120), (130, 163760), (160, 133055), (178, 119600), (184, 115700), (200, 106444), (208, 102350), (230, 92560), (260, 81880), (299, 71200), (325, 65504), (356, 59800), (368, 57850), (400, 53222), (416, 51175), (445, 47840), (460, 46280), (520, 40940), (575, 37024), (598, 35600), (650, 32752), (712, 29900), (736, 28925), (800, 26611), (890, 23920), (920, 23140), (1040, 20470), (1150, 18512), (1157, 18400), (1196, 17800), (1300, 16376), (1424, 14950), (1495, 14240), (1780, 11960), (1840, 11570), (2047, 10400), (2080, 10235), (2225, 9568), (2300, 9256), (2314, 9200), (2392, 8900), (2600, 8188), (2848, 7475), (2990, 7120), (3560, 5980), (3680, 5785), (4094, 5200), (4450, 4784), (4600, 4628)]