18974800

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 120

約数和(自身を含む): 50856120

約数和(自身を除く): 31881320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 40, 41, 50, 52, 65, 80, 82, 89, 100, 104, 130, 164, 178, 200, 205, 208, 260, 325, 328, 356, 400, 410, 445, 520, 533, 650, 656, 712, 820, 890, 1025, 1040, 1066, 1157, 1300, 1424, 1640, 1780, 2050, 2132, 2225, 2314, 2600, 2665, 3280, 3560, 3649, 4100, 4264, 4450, 4628, 5200, 5330, 5785, 7120, 7298, 8200, 8528, 8900, 9256, 10660, 11570, 13325, 14596, 16400, 17800, 18245, 18512, 21320, 23140, 26650, 28925, 29192, 35600, 36490, 42640, 46280, 47437, 53300, 57850, 58384, 72980, 91225, 92560, 94874, 106600, 115700, 145960, 182450, 189748, 213200, 231400, 237185, 291920, 364900, 379496, 462800, 474370, 729800, 758992, 948740, 1185925, 1459600, 1897480, 2371850, 3794960, 4743700, 9487400, 18974800]

約数ペア:

[(1, 18974800), (2, 9487400), (4, 4743700), (5, 3794960), (8, 2371850), (10, 1897480), (13, 1459600), (16, 1185925), (20, 948740), (25, 758992), (26, 729800), (40, 474370), (41, 462800), (50, 379496), (52, 364900), (65, 291920), (80, 237185), (82, 231400), (89, 213200), (100, 189748), (104, 182450), (130, 145960), (164, 115700), (178, 106600), (200, 94874), (205, 92560), (208, 91225), (260, 72980), (325, 58384), (328, 57850), (356, 53300), (400, 47437), (410, 46280), (445, 42640), (520, 36490), (533, 35600), (650, 29192), (656, 28925), (712, 26650), (820, 23140), (890, 21320), (1025, 18512), (1040, 18245), (1066, 17800), (1157, 16400), (1300, 14596), (1424, 13325), (1640, 11570), (1780, 10660), (2050, 9256), (2132, 8900), (2225, 8528), (2314, 8200), (2600, 7298), (2665, 7120), (3280, 5785), (3560, 5330), (3649, 5200), (4100, 4628), (4264, 4450)]