19802800

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1597}}^1$

素因数の和:1646

約数の個数: 60

約数和(自身を含む): 49141696

約数和(自身を除く): 29338896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 155, 200, 248, 310, 400, 496, 620, 775, 1240, 1550, 1597, 2480, 3100, 3194, 6200, 6388, 7985, 12400, 12776, 15970, 25552, 31940, 39925, 49507, 63880, 79850, 99014, 127760, 159700, 198028, 247535, 319400, 396056, 495070, 638800, 792112, 990140, 1237675, 1980280, 2475350, 3960560, 4950700, 9901400, 19802800]

約数ペア:

[(1, 19802800), (2, 9901400), (4, 4950700), (5, 3960560), (8, 2475350), (10, 1980280), (16, 1237675), (20, 990140), (25, 792112), (31, 638800), (40, 495070), (50, 396056), (62, 319400), (80, 247535), (100, 198028), (124, 159700), (155, 127760), (200, 99014), (248, 79850), (310, 63880), (400, 49507), (496, 39925), (620, 31940), (775, 25552), (1240, 15970), (1550, 12776), (1597, 12400), (2480, 7985), (3100, 6388), (3194, 6200)]