21747460

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{953}}^1$

素因数の和:1132

約数の個数: 48

約数和(自身を含む): 52569216

約数和(自身を除く): 30821756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 163, 326, 652, 815, 953, 1141, 1630, 1906, 2282, 3260, 3812, 4564, 4765, 5705, 6671, 9530, 11410, 13342, 19060, 22820, 26684, 33355, 66710, 133420, 155339, 310678, 621356, 776695, 1087373, 1553390, 2174746, 3106780, 4349492, 5436865, 10873730, 21747460]

約数ペア:

[(1, 21747460), (2, 10873730), (4, 5436865), (5, 4349492), (7, 3106780), (10, 2174746), (14, 1553390), (20, 1087373), (28, 776695), (35, 621356), (70, 310678), (140, 155339), (163, 133420), (326, 66710), (652, 33355), (815, 26684), (953, 22820), (1141, 19060), (1630, 13342), (1906, 11410), (2282, 9530), (3260, 6671), (3812, 5705), (4564, 4765)]