19987500

素因数分解:

$2^2\times 3^1\times 5^5\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:86

約数の個数: 144

約数和(自身を含む): 64308384

約数和(自身を除く): 44320884

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 41, 50, 52, 60, 65, 75, 78, 82, 100, 123, 125, 130, 150, 156, 164, 195, 205, 246, 250, 260, 300, 325, 375, 390, 410, 492, 500, 533, 615, 625, 650, 750, 780, 820, 975, 1025, 1066, 1230, 1250, 1300, 1500, 1599, 1625, 1875, 1950, 2050, 2132, 2460, 2500, 2665, 3075, 3125, 3198, 3250, 3750, 3900, 4100, 4875, 5125, 5330, 6150, 6250, 6396, 6500, 7500, 7995, 8125, 9375, 9750, 10250, 10660, 12300, 12500, 13325, 15375, 15990, 16250, 18750, 19500, 20500, 24375, 25625, 26650, 30750, 31980, 32500, 37500, 39975, 40625, 48750, 51250, 53300, 61500, 66625, 76875, 79950, 81250, 97500, 102500, 121875, 128125, 133250, 153750, 159900, 162500, 199875, 243750, 256250, 266500, 307500, 333125, 384375, 399750, 487500, 512500, 666250, 768750, 799500, 999375, 1332500, 1537500, 1665625, 1998750, 3331250, 3997500, 4996875, 6662500, 9993750, 19987500]

約数ペア:

[(1, 19987500), (2, 9993750), (3, 6662500), (4, 4996875), (5, 3997500), (6, 3331250), (10, 1998750), (12, 1665625), (13, 1537500), (15, 1332500), (20, 999375), (25, 799500), (26, 768750), (30, 666250), (39, 512500), (41, 487500), (50, 399750), (52, 384375), (60, 333125), (65, 307500), (75, 266500), (78, 256250), (82, 243750), (100, 199875), (123, 162500), (125, 159900), (130, 153750), (150, 133250), (156, 128125), (164, 121875), (195, 102500), (205, 97500), (246, 81250), (250, 79950), (260, 76875), (300, 66625), (325, 61500), (375, 53300), (390, 51250), (410, 48750), (492, 40625), (500, 39975), (533, 37500), (615, 32500), (625, 31980), (650, 30750), (750, 26650), (780, 25625), (820, 24375), (975, 20500), (1025, 19500), (1066, 18750), (1230, 16250), (1250, 15990), (1300, 15375), (1500, 13325), (1599, 12500), (1625, 12300), (1875, 10660), (1950, 10250), (2050, 9750), (2132, 9375), (2460, 8125), (2500, 7995), (2665, 7500), (3075, 6500), (3125, 6396), (3198, 6250), (3250, 6150), (3750, 5330), (3900, 5125), (4100, 4875)]