20438080

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^3$

素因数の和:81

約数の個数: 112

約数和(自身を含む): 55686960

約数和(自身を除く): 35248880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 32, 34, 40, 52, 64, 65, 68, 80, 85, 104, 130, 136, 160, 170, 208, 221, 260, 272, 289, 320, 340, 416, 442, 520, 544, 578, 680, 832, 884, 1040, 1088, 1105, 1156, 1360, 1445, 1768, 2080, 2210, 2312, 2720, 2890, 3536, 3757, 4160, 4420, 4624, 4913, 5440, 5780, 7072, 7514, 8840, 9248, 9826, 11560, 14144, 15028, 17680, 18496, 18785, 19652, 23120, 24565, 30056, 35360, 37570, 39304, 46240, 49130, 60112, 63869, 70720, 75140, 78608, 92480, 98260, 120224, 127738, 150280, 157216, 196520, 240448, 255476, 300560, 314432, 319345, 393040, 510952, 601120, 638690, 786080, 1021904, 1202240, 1277380, 1572160, 2043808, 2554760, 4087616, 5109520, 10219040, 20438080]

約数ペア:

[(1, 20438080), (2, 10219040), (4, 5109520), (5, 4087616), (8, 2554760), (10, 2043808), (13, 1572160), (16, 1277380), (17, 1202240), (20, 1021904), (26, 786080), (32, 638690), (34, 601120), (40, 510952), (52, 393040), (64, 319345), (65, 314432), (68, 300560), (80, 255476), (85, 240448), (104, 196520), (130, 157216), (136, 150280), (160, 127738), (170, 120224), (208, 98260), (221, 92480), (260, 78608), (272, 75140), (289, 70720), (320, 63869), (340, 60112), (416, 49130), (442, 46240), (520, 39304), (544, 37570), (578, 35360), (680, 30056), (832, 24565), (884, 23120), (1040, 19652), (1088, 18785), (1105, 18496), (1156, 17680), (1360, 15028), (1445, 14144), (1768, 11560), (2080, 9826), (2210, 9248), (2312, 8840), (2720, 7514), (2890, 7072), (3536, 5780), (3757, 5440), (4160, 4913), (4420, 4624)]