19788400

素因数分解:

$2^4\times 5^2\times {\mathrm{61}}^1\times {\mathrm{811}}^1$

素因数の和:890

約数の個数: 60

約数和(自身を含む): 48380584

約数和(自身を除く): 28592184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 61, 80, 100, 122, 200, 244, 305, 400, 488, 610, 811, 976, 1220, 1525, 1622, 2440, 3050, 3244, 4055, 4880, 6100, 6488, 8110, 12200, 12976, 16220, 20275, 24400, 32440, 40550, 49471, 64880, 81100, 98942, 162200, 197884, 247355, 324400, 395768, 494710, 791536, 989420, 1236775, 1978840, 2473550, 3957680, 4947100, 9894200, 19788400]

約数ペア:

[(1, 19788400), (2, 9894200), (4, 4947100), (5, 3957680), (8, 2473550), (10, 1978840), (16, 1236775), (20, 989420), (25, 791536), (40, 494710), (50, 395768), (61, 324400), (80, 247355), (100, 197884), (122, 162200), (200, 98942), (244, 81100), (305, 64880), (400, 49471), (488, 40550), (610, 32440), (811, 24400), (976, 20275), (1220, 16220), (1525, 12976), (1622, 12200), (2440, 8110), (3050, 6488), (3244, 6100), (4055, 4880)]