19814540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{269}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 23731060

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 127, 145, 254, 269, 290, 508, 538, 580, 635, 1076, 1270, 1345, 2540, 2690, 3683, 5380, 7366, 7801, 14732, 15602, 18415, 31204, 34163, 36830, 39005, 68326, 73660, 78010, 136652, 156020, 170815, 341630, 683260, 990727, 1981454, 3962908, 4953635, 9907270, 19814540]

約数ペア:

[(1, 19814540), (2, 9907270), (4, 4953635), (5, 3962908), (10, 1981454), (20, 990727), (29, 683260), (58, 341630), (116, 170815), (127, 156020), (145, 136652), (254, 78010), (269, 73660), (290, 68326), (508, 39005), (538, 36830), (580, 34163), (635, 31204), (1076, 18415), (1270, 15602), (1345, 14732), (2540, 7801), (2690, 7366), (3683, 5380)]