21905840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{73}}^1$

素因数の和:139

約数の個数: 120

約数和(自身を含む): 58579584

約数和(自身を除く): 36673744

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 73, 80, 88, 110, 121, 124, 146, 155, 176, 220, 242, 248, 292, 310, 341, 365, 440, 484, 496, 584, 605, 620, 682, 730, 803, 880, 968, 1168, 1210, 1240, 1364, 1460, 1606, 1705, 1936, 2263, 2420, 2480, 2728, 2920, 3212, 3410, 3751, 4015, 4526, 4840, 5456, 5840, 6424, 6820, 7502, 8030, 8833, 9052, 9680, 11315, 12848, 13640, 15004, 16060, 17666, 18104, 18755, 22630, 24893, 27280, 30008, 32120, 35332, 36208, 37510, 44165, 45260, 49786, 60016, 64240, 70664, 75020, 88330, 90520, 99572, 124465, 141328, 150040, 176660, 181040, 199144, 248930, 273823, 300080, 353320, 398288, 497860, 547646, 706640, 995720, 1095292, 1369115, 1991440, 2190584, 2738230, 4381168, 5476460, 10952920, 21905840]

約数ペア:

[(1, 21905840), (2, 10952920), (4, 5476460), (5, 4381168), (8, 2738230), (10, 2190584), (11, 1991440), (16, 1369115), (20, 1095292), (22, 995720), (31, 706640), (40, 547646), (44, 497860), (55, 398288), (62, 353320), (73, 300080), (80, 273823), (88, 248930), (110, 199144), (121, 181040), (124, 176660), (146, 150040), (155, 141328), (176, 124465), (220, 99572), (242, 90520), (248, 88330), (292, 75020), (310, 70664), (341, 64240), (365, 60016), (440, 49786), (484, 45260), (496, 44165), (584, 37510), (605, 36208), (620, 35332), (682, 32120), (730, 30008), (803, 27280), (880, 24893), (968, 22630), (1168, 18755), (1210, 18104), (1240, 17666), (1364, 16060), (1460, 15004), (1606, 13640), (1705, 12848), (1936, 11315), (2263, 9680), (2420, 9052), (2480, 8833), (2728, 8030), (2920, 7502), (3212, 6820), (3410, 6424), (3751, 5840), (4015, 5456), (4526, 4840)]