20860840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{521}}^1$

素因数の和:563

約数の個数: 128

約数和(自身を含む): 63141120

約数和(自身を除く): 42280280

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 20, 22, 26, 28, 35, 40, 44, 52, 55, 56, 65, 70, 77, 88, 91, 104, 110, 130, 140, 143, 154, 182, 220, 260, 280, 286, 308, 364, 385, 440, 455, 520, 521, 572, 616, 715, 728, 770, 910, 1001, 1042, 1144, 1430, 1540, 1820, 2002, 2084, 2605, 2860, 3080, 3640, 3647, 4004, 4168, 5005, 5210, 5720, 5731, 6773, 7294, 8008, 10010, 10420, 11462, 13546, 14588, 18235, 20020, 20840, 22924, 27092, 28655, 29176, 33865, 36470, 40040, 40117, 45848, 47411, 54184, 57310, 67730, 72940, 74503, 80234, 94822, 114620, 135460, 145880, 149006, 160468, 189644, 200585, 229240, 237055, 270920, 298012, 320936, 372515, 379288, 401170, 474110, 521521, 596024, 745030, 802340, 948220, 1043042, 1490060, 1604680, 1896440, 2086084, 2607605, 2980120, 4172168, 5215210, 10430420, 20860840]

約数ペア:

[(1, 20860840), (2, 10430420), (4, 5215210), (5, 4172168), (7, 2980120), (8, 2607605), (10, 2086084), (11, 1896440), (13, 1604680), (14, 1490060), (20, 1043042), (22, 948220), (26, 802340), (28, 745030), (35, 596024), (40, 521521), (44, 474110), (52, 401170), (55, 379288), (56, 372515), (65, 320936), (70, 298012), (77, 270920), (88, 237055), (91, 229240), (104, 200585), (110, 189644), (130, 160468), (140, 149006), (143, 145880), (154, 135460), (182, 114620), (220, 94822), (260, 80234), (280, 74503), (286, 72940), (308, 67730), (364, 57310), (385, 54184), (440, 47411), (455, 45848), (520, 40117), (521, 40040), (572, 36470), (616, 33865), (715, 29176), (728, 28655), (770, 27092), (910, 22924), (1001, 20840), (1042, 20020), (1144, 18235), (1430, 14588), (1540, 13546), (1820, 11462), (2002, 10420), (2084, 10010), (2605, 8008), (2860, 7294), (3080, 6773), (3640, 5731), (3647, 5720), (4004, 5210), (4168, 5005)]