19781600

素因数分解:

$2^5\times 5^2\times {\mathrm{79}}^1\times {\mathrm{313}}^1$

素因数の和:412

約数の個数: 72

約数和(自身を含む): 49059360

約数和(自身を除く): 29277760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 79, 80, 100, 158, 160, 200, 313, 316, 395, 400, 626, 632, 790, 800, 1252, 1264, 1565, 1580, 1975, 2504, 2528, 3130, 3160, 3950, 5008, 6260, 6320, 7825, 7900, 10016, 12520, 12640, 15650, 15800, 24727, 25040, 31300, 31600, 49454, 50080, 62600, 63200, 98908, 123635, 125200, 197816, 247270, 250400, 395632, 494540, 618175, 791264, 989080, 1236350, 1978160, 2472700, 3956320, 4945400, 9890800, 19781600]

約数ペア:

[(1, 19781600), (2, 9890800), (4, 4945400), (5, 3956320), (8, 2472700), (10, 1978160), (16, 1236350), (20, 989080), (25, 791264), (32, 618175), (40, 494540), (50, 395632), (79, 250400), (80, 247270), (100, 197816), (158, 125200), (160, 123635), (200, 98908), (313, 63200), (316, 62600), (395, 50080), (400, 49454), (626, 31600), (632, 31300), (790, 25040), (800, 24727), (1252, 15800), (1264, 15650), (1565, 12640), (1580, 12520), (1975, 10016), (2504, 7900), (2528, 7825), (3130, 6320), (3160, 6260), (3950, 5008)]