20438620

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{269}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 44906400

約数和(自身を除く): 24467780

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 131, 145, 262, 269, 290, 524, 538, 580, 655, 1076, 1310, 1345, 2620, 2690, 3799, 5380, 7598, 7801, 15196, 15602, 18995, 31204, 35239, 37990, 39005, 70478, 75980, 78010, 140956, 156020, 176195, 352390, 704780, 1021931, 2043862, 4087724, 5109655, 10219310, 20438620]

約数ペア:

[(1, 20438620), (2, 10219310), (4, 5109655), (5, 4087724), (10, 2043862), (20, 1021931), (29, 704780), (58, 352390), (116, 176195), (131, 156020), (145, 140956), (262, 78010), (269, 75980), (290, 70478), (524, 39005), (538, 37990), (580, 35239), (655, 31204), (1076, 18995), (1310, 15602), (1345, 15196), (2620, 7801), (2690, 7598), (3799, 5380)]