20903120

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{229}}^1$

素因数の和:412

約数の個数: 80

約数和(自身を含む): 56127360

約数和(自身を除く): 35224240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 163, 229, 280, 326, 458, 560, 652, 815, 916, 1141, 1145, 1304, 1603, 1630, 1832, 2282, 2290, 2608, 3206, 3260, 3664, 4564, 4580, 5705, 6412, 6520, 8015, 9128, 9160, 11410, 12824, 13040, 16030, 18256, 18320, 22820, 25648, 32060, 37327, 45640, 64120, 74654, 91280, 128240, 149308, 186635, 261289, 298616, 373270, 522578, 597232, 746540, 1045156, 1306445, 1493080, 2090312, 2612890, 2986160, 4180624, 5225780, 10451560, 20903120]

約数ペア:

[(1, 20903120), (2, 10451560), (4, 5225780), (5, 4180624), (7, 2986160), (8, 2612890), (10, 2090312), (14, 1493080), (16, 1306445), (20, 1045156), (28, 746540), (35, 597232), (40, 522578), (56, 373270), (70, 298616), (80, 261289), (112, 186635), (140, 149308), (163, 128240), (229, 91280), (280, 74654), (326, 64120), (458, 45640), (560, 37327), (652, 32060), (815, 25648), (916, 22820), (1141, 18320), (1145, 18256), (1304, 16030), (1603, 13040), (1630, 12824), (1832, 11410), (2282, 9160), (2290, 9128), (2608, 8015), (3206, 6520), (3260, 6412), (3664, 5705), (4564, 4580)]