21327800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^2\times {\mathrm{631}}^1$

素因数の和:673

約数の個数: 72

約数和(自身を含む): 53780040

約数和(自身を除く): 32452240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 169, 200, 260, 325, 338, 520, 631, 650, 676, 845, 1262, 1300, 1352, 1690, 2524, 2600, 3155, 3380, 4225, 5048, 6310, 6760, 8203, 8450, 12620, 15775, 16406, 16900, 25240, 31550, 32812, 33800, 41015, 63100, 65624, 82030, 106639, 126200, 164060, 205075, 213278, 328120, 410150, 426556, 533195, 820300, 853112, 1066390, 1640600, 2132780, 2665975, 4265560, 5331950, 10663900, 21327800]

約数ペア:

[(1, 21327800), (2, 10663900), (4, 5331950), (5, 4265560), (8, 2665975), (10, 2132780), (13, 1640600), (20, 1066390), (25, 853112), (26, 820300), (40, 533195), (50, 426556), (52, 410150), (65, 328120), (100, 213278), (104, 205075), (130, 164060), (169, 126200), (200, 106639), (260, 82030), (325, 65624), (338, 63100), (520, 41015), (631, 33800), (650, 32812), (676, 31550), (845, 25240), (1262, 16900), (1300, 16406), (1352, 15775), (1690, 12620), (2524, 8450), (2600, 8203), (3155, 6760), (3380, 6310), (4225, 5048)]