20478900

素因数分解:

$2^2\times 3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:178

約数の個数: 144

約数和(自身を含む): 65620800

約数和(自身を除く): 45141900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 25, 26, 30, 39, 50, 52, 59, 60, 65, 75, 78, 89, 100, 118, 130, 150, 156, 177, 178, 195, 236, 260, 267, 295, 300, 325, 354, 356, 390, 445, 534, 590, 650, 708, 767, 780, 885, 890, 975, 1068, 1157, 1180, 1300, 1335, 1475, 1534, 1770, 1780, 1950, 2225, 2301, 2314, 2670, 2950, 3068, 3471, 3540, 3835, 3900, 4425, 4450, 4602, 4628, 5251, 5340, 5785, 5900, 6675, 6942, 7670, 8850, 8900, 9204, 10502, 11505, 11570, 13350, 13884, 15340, 15753, 17355, 17700, 19175, 21004, 23010, 23140, 26255, 26700, 28925, 31506, 34710, 38350, 46020, 52510, 57525, 57850, 63012, 68263, 69420, 76700, 78765, 86775, 105020, 115050, 115700, 131275, 136526, 157530, 173550, 204789, 230100, 262550, 273052, 315060, 341315, 347100, 393825, 409578, 525100, 682630, 787650, 819156, 1023945, 1365260, 1575300, 1706575, 2047890, 3413150, 4095780, 5119725, 6826300, 10239450, 20478900]

約数ペア:

[(1, 20478900), (2, 10239450), (3, 6826300), (4, 5119725), (5, 4095780), (6, 3413150), (10, 2047890), (12, 1706575), (13, 1575300), (15, 1365260), (20, 1023945), (25, 819156), (26, 787650), (30, 682630), (39, 525100), (50, 409578), (52, 393825), (59, 347100), (60, 341315), (65, 315060), (75, 273052), (78, 262550), (89, 230100), (100, 204789), (118, 173550), (130, 157530), (150, 136526), (156, 131275), (177, 115700), (178, 115050), (195, 105020), (236, 86775), (260, 78765), (267, 76700), (295, 69420), (300, 68263), (325, 63012), (354, 57850), (356, 57525), (390, 52510), (445, 46020), (534, 38350), (590, 34710), (650, 31506), (708, 28925), (767, 26700), (780, 26255), (885, 23140), (890, 23010), (975, 21004), (1068, 19175), (1157, 17700), (1180, 17355), (1300, 15753), (1335, 15340), (1475, 13884), (1534, 13350), (1770, 11570), (1780, 11505), (1950, 10502), (2225, 9204), (2301, 8900), (2314, 8850), (2670, 7670), (2950, 6942), (3068, 6675), (3471, 5900), (3540, 5785), (3835, 5340), (3900, 5251), (4425, 4628), (4450, 4602)]