28919800

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{227}}^1$

素因数の和:270

約数の個数: 144

約数和(自身を含む): 84603960

約数和(自身を除く): 55684160

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 25, 26, 28, 35, 40, 49, 50, 52, 56, 65, 70, 91, 98, 100, 104, 130, 140, 175, 182, 196, 200, 227, 245, 260, 280, 325, 350, 364, 392, 454, 455, 490, 520, 637, 650, 700, 728, 908, 910, 980, 1135, 1225, 1274, 1300, 1400, 1589, 1816, 1820, 1960, 2270, 2275, 2450, 2548, 2600, 2951, 3178, 3185, 3640, 4540, 4550, 4900, 5096, 5675, 5902, 6356, 6370, 7945, 9080, 9100, 9800, 11123, 11350, 11804, 12712, 12740, 14755, 15890, 15925, 18200, 20657, 22246, 22700, 23608, 25480, 29510, 31780, 31850, 39725, 41314, 44492, 45400, 55615, 59020, 63560, 63700, 73775, 79450, 82628, 88984, 103285, 111230, 118040, 127400, 144599, 147550, 158900, 165256, 206570, 222460, 278075, 289198, 295100, 317800, 413140, 444920, 516425, 556150, 578396, 590200, 722995, 826280, 1032850, 1112300, 1156792, 1445990, 2065700, 2224600, 2891980, 3614975, 4131400, 5783960, 7229950, 14459900, 28919800]

約数ペア:

[(1, 28919800), (2, 14459900), (4, 7229950), (5, 5783960), (7, 4131400), (8, 3614975), (10, 2891980), (13, 2224600), (14, 2065700), (20, 1445990), (25, 1156792), (26, 1112300), (28, 1032850), (35, 826280), (40, 722995), (49, 590200), (50, 578396), (52, 556150), (56, 516425), (65, 444920), (70, 413140), (91, 317800), (98, 295100), (100, 289198), (104, 278075), (130, 222460), (140, 206570), (175, 165256), (182, 158900), (196, 147550), (200, 144599), (227, 127400), (245, 118040), (260, 111230), (280, 103285), (325, 88984), (350, 82628), (364, 79450), (392, 73775), (454, 63700), (455, 63560), (490, 59020), (520, 55615), (637, 45400), (650, 44492), (700, 41314), (728, 39725), (908, 31850), (910, 31780), (980, 29510), (1135, 25480), (1225, 23608), (1274, 22700), (1300, 22246), (1400, 20657), (1589, 18200), (1816, 15925), (1820, 15890), (1960, 14755), (2270, 12740), (2275, 12712), (2450, 11804), (2548, 11350), (2600, 11123), (2951, 9800), (3178, 9100), (3185, 9080), (3640, 7945), (4540, 6370), (4550, 6356), (4900, 5902), (5096, 5675)]