19542040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{983}}^1$

素因数の和:1072

約数の個数: 64

約数和(自身を含む): 51010560

約数和(自身を除く): 31468520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 983, 994, 1420, 1966, 1988, 2485, 2840, 3932, 3976, 4915, 4970, 6881, 7864, 9830, 9940, 13762, 19660, 19880, 27524, 34405, 39320, 55048, 68810, 69793, 137620, 139586, 275240, 279172, 348965, 488551, 558344, 697930, 977102, 1395860, 1954204, 2442755, 2791720, 3908408, 4885510, 9771020, 19542040]

約数ペア:

[(1, 19542040), (2, 9771020), (4, 4885510), (5, 3908408), (7, 2791720), (8, 2442755), (10, 1954204), (14, 1395860), (20, 977102), (28, 697930), (35, 558344), (40, 488551), (56, 348965), (70, 279172), (71, 275240), (140, 139586), (142, 137620), (280, 69793), (284, 68810), (355, 55048), (497, 39320), (568, 34405), (710, 27524), (983, 19880), (994, 19660), (1420, 13762), (1966, 9940), (1988, 9830), (2485, 7864), (2840, 6881), (3932, 4970), (3976, 4915)]