19859120

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:330

約数の個数: 80

約数和(自身を含む): 49496832

約数和(自身を除く): 29637712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 43, 46, 80, 86, 92, 115, 172, 184, 215, 230, 251, 344, 368, 430, 460, 502, 688, 860, 920, 989, 1004, 1255, 1720, 1840, 1978, 2008, 2510, 3440, 3956, 4016, 4945, 5020, 5773, 7912, 9890, 10040, 10793, 11546, 15824, 19780, 20080, 21586, 23092, 28865, 39560, 43172, 46184, 53965, 57730, 79120, 86344, 92368, 107930, 115460, 172688, 215860, 230920, 248239, 431720, 461840, 496478, 863440, 992956, 1241195, 1985912, 2482390, 3971824, 4964780, 9929560, 19859120]

約数ペア:

[(1, 19859120), (2, 9929560), (4, 4964780), (5, 3971824), (8, 2482390), (10, 1985912), (16, 1241195), (20, 992956), (23, 863440), (40, 496478), (43, 461840), (46, 431720), (80, 248239), (86, 230920), (92, 215860), (115, 172688), (172, 115460), (184, 107930), (215, 92368), (230, 86344), (251, 79120), (344, 57730), (368, 53965), (430, 46184), (460, 43172), (502, 39560), (688, 28865), (860, 23092), (920, 21586), (989, 20080), (1004, 19780), (1255, 15824), (1720, 11546), (1840, 10793), (1978, 10040), (2008, 9890), (2510, 7912), (3440, 5773), (3956, 5020), (4016, 4945)]