21303880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{773}}^1$

素因数の和:850

約数の個数: 64

約数和(自身を含む): 52662960

約数和(自身を除く): 31359080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 773, 1060, 1378, 1546, 2120, 2756, 3092, 3445, 3865, 5512, 6184, 6890, 7730, 10049, 13780, 15460, 20098, 27560, 30920, 40196, 40969, 50245, 80392, 81938, 100490, 163876, 200980, 204845, 327752, 401960, 409690, 532597, 819380, 1065194, 1638760, 2130388, 2662985, 4260776, 5325970, 10651940, 21303880]

約数ペア:

[(1, 21303880), (2, 10651940), (4, 5325970), (5, 4260776), (8, 2662985), (10, 2130388), (13, 1638760), (20, 1065194), (26, 819380), (40, 532597), (52, 409690), (53, 401960), (65, 327752), (104, 204845), (106, 200980), (130, 163876), (212, 100490), (260, 81938), (265, 80392), (424, 50245), (520, 40969), (530, 40196), (689, 30920), (773, 27560), (1060, 20098), (1378, 15460), (1546, 13780), (2120, 10049), (2756, 7730), (3092, 6890), (3445, 6184), (3865, 5512)]