21205600

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{2039}}^1$

素因数の和:2072

約数の個数: 72

約数和(自身を含む): 55777680

約数和(自身を除く): 34572080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 65, 80, 100, 104, 130, 160, 200, 208, 260, 325, 400, 416, 520, 650, 800, 1040, 1300, 2039, 2080, 2600, 4078, 5200, 8156, 10195, 10400, 16312, 20390, 26507, 32624, 40780, 50975, 53014, 65248, 81560, 101950, 106028, 132535, 163120, 203900, 212056, 265070, 326240, 407800, 424112, 530140, 662675, 815600, 848224, 1060280, 1325350, 1631200, 2120560, 2650700, 4241120, 5301400, 10602800, 21205600]

約数ペア:

[(1, 21205600), (2, 10602800), (4, 5301400), (5, 4241120), (8, 2650700), (10, 2120560), (13, 1631200), (16, 1325350), (20, 1060280), (25, 848224), (26, 815600), (32, 662675), (40, 530140), (50, 424112), (52, 407800), (65, 326240), (80, 265070), (100, 212056), (104, 203900), (130, 163120), (160, 132535), (200, 106028), (208, 101950), (260, 81560), (325, 65248), (400, 53014), (416, 50975), (520, 40780), (650, 32624), (800, 26507), (1040, 20390), (1300, 16312), (2039, 10400), (2080, 10195), (2600, 8156), (4078, 5200)]