2821000

素因数分解:

$2^3\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:72

約数の個数: 128

約数和(自身を含む): 8386560

約数和(自身を除く): 5565560

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 25, 26, 28, 31, 35, 40, 50, 52, 56, 62, 65, 70, 91, 100, 104, 124, 125, 130, 140, 155, 175, 182, 200, 217, 248, 250, 260, 280, 310, 325, 350, 364, 403, 434, 455, 500, 520, 620, 650, 700, 728, 775, 806, 868, 875, 910, 1000, 1085, 1240, 1300, 1400, 1550, 1612, 1625, 1736, 1750, 1820, 2015, 2170, 2275, 2600, 2821, 3100, 3224, 3250, 3500, 3640, 3875, 4030, 4340, 4550, 5425, 5642, 6200, 6500, 7000, 7750, 8060, 8680, 9100, 10075, 10850, 11284, 11375, 13000, 14105, 15500, 16120, 18200, 20150, 21700, 22568, 22750, 27125, 28210, 31000, 40300, 43400, 45500, 50375, 54250, 56420, 70525, 80600, 91000, 100750, 108500, 112840, 141050, 201500, 217000, 282100, 352625, 403000, 564200, 705250, 1410500, 2821000]

約数ペア:

[(1, 2821000), (2, 1410500), (4, 705250), (5, 564200), (7, 403000), (8, 352625), (10, 282100), (13, 217000), (14, 201500), (20, 141050), (25, 112840), (26, 108500), (28, 100750), (31, 91000), (35, 80600), (40, 70525), (50, 56420), (52, 54250), (56, 50375), (62, 45500), (65, 43400), (70, 40300), (91, 31000), (100, 28210), (104, 27125), (124, 22750), (125, 22568), (130, 21700), (140, 20150), (155, 18200), (175, 16120), (182, 15500), (200, 14105), (217, 13000), (248, 11375), (250, 11284), (260, 10850), (280, 10075), (310, 9100), (325, 8680), (350, 8060), (364, 7750), (403, 7000), (434, 6500), (455, 6200), (500, 5642), (520, 5425), (620, 4550), (650, 4340), (700, 4030), (728, 3875), (775, 3640), (806, 3500), (868, 3250), (875, 3224), (910, 3100), (1000, 2821), (1085, 2600), (1240, 2275), (1300, 2170), (1400, 2015), (1550, 1820), (1612, 1750), (1625, 1736)]