20485800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:640

約数の個数: 144

約数和(自身を含む): 72540000

約数和(自身を除く): 52054200

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 25, 30, 36, 38, 40, 45, 50, 57, 60, 72, 75, 76, 90, 95, 100, 114, 120, 150, 152, 171, 180, 190, 200, 225, 228, 285, 300, 342, 360, 380, 450, 456, 475, 570, 599, 600, 684, 760, 855, 900, 950, 1140, 1198, 1368, 1425, 1710, 1797, 1800, 1900, 2280, 2396, 2850, 2995, 3420, 3594, 3800, 4275, 4792, 5391, 5700, 5990, 6840, 7188, 8550, 8985, 10782, 11381, 11400, 11980, 14376, 14975, 17100, 17970, 21564, 22762, 23960, 26955, 29950, 34143, 34200, 35940, 43128, 44925, 45524, 53910, 56905, 59900, 68286, 71880, 89850, 91048, 102429, 107820, 113810, 119800, 134775, 136572, 170715, 179700, 204858, 215640, 227620, 269550, 273144, 284525, 341430, 359400, 409716, 455240, 512145, 539100, 569050, 682860, 819432, 853575, 1024290, 1078200, 1138100, 1365720, 1707150, 2048580, 2276200, 2560725, 3414300, 4097160, 5121450, 6828600, 10242900, 20485800]

約数ペア:

[(1, 20485800), (2, 10242900), (3, 6828600), (4, 5121450), (5, 4097160), (6, 3414300), (8, 2560725), (9, 2276200), (10, 2048580), (12, 1707150), (15, 1365720), (18, 1138100), (19, 1078200), (20, 1024290), (24, 853575), (25, 819432), (30, 682860), (36, 569050), (38, 539100), (40, 512145), (45, 455240), (50, 409716), (57, 359400), (60, 341430), (72, 284525), (75, 273144), (76, 269550), (90, 227620), (95, 215640), (100, 204858), (114, 179700), (120, 170715), (150, 136572), (152, 134775), (171, 119800), (180, 113810), (190, 107820), (200, 102429), (225, 91048), (228, 89850), (285, 71880), (300, 68286), (342, 59900), (360, 56905), (380, 53910), (450, 45524), (456, 44925), (475, 43128), (570, 35940), (599, 34200), (600, 34143), (684, 29950), (760, 26955), (855, 23960), (900, 22762), (950, 21564), (1140, 17970), (1198, 17100), (1368, 14975), (1425, 14376), (1710, 11980), (1797, 11400), (1800, 11381), (1900, 10782), (2280, 8985), (2396, 8550), (2850, 7188), (2995, 6840), (3420, 5990), (3594, 5700), (3800, 5391), (4275, 4792)]