21147520

素因数分解:

$2^7\times 5^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:383

約数の個数: 64

約数和(自身を含む): 51114240

約数和(自身を除く): 29966720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 173, 191, 320, 346, 382, 640, 692, 764, 865, 955, 1384, 1528, 1730, 1910, 2768, 3056, 3460, 3820, 5536, 6112, 6920, 7640, 11072, 12224, 13840, 15280, 22144, 24448, 27680, 30560, 33043, 55360, 61120, 66086, 110720, 122240, 132172, 165215, 264344, 330430, 528688, 660860, 1057376, 1321720, 2114752, 2643440, 4229504, 5286880, 10573760, 21147520]

約数ペア:

[(1, 21147520), (2, 10573760), (4, 5286880), (5, 4229504), (8, 2643440), (10, 2114752), (16, 1321720), (20, 1057376), (32, 660860), (40, 528688), (64, 330430), (80, 264344), (128, 165215), (160, 132172), (173, 122240), (191, 110720), (320, 66086), (346, 61120), (382, 55360), (640, 33043), (692, 30560), (764, 27680), (865, 24448), (955, 22144), (1384, 15280), (1528, 13840), (1730, 12224), (1910, 11072), (2768, 7640), (3056, 6920), (3460, 6112), (3820, 5536)]