21620872

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1747}}^1$

素因数の和:1790

約数の個数: 64

約数和(自身を含む): 52859520

約数和(自身を除く): 31238648

約数列:

[1, 2, 4, 7, 8, 13, 14, 17, 26, 28, 34, 52, 56, 68, 91, 104, 119, 136, 182, 221, 238, 364, 442, 476, 728, 884, 952, 1547, 1747, 1768, 3094, 3494, 6188, 6988, 12229, 12376, 13976, 22711, 24458, 29699, 45422, 48916, 59398, 90844, 97832, 118796, 158977, 181688, 207893, 237592, 317954, 386087, 415786, 635908, 772174, 831572, 1271816, 1544348, 1663144, 2702609, 3088696, 5405218, 10810436, 21620872]

約数ペア:

[(1, 21620872), (2, 10810436), (4, 5405218), (7, 3088696), (8, 2702609), (13, 1663144), (14, 1544348), (17, 1271816), (26, 831572), (28, 772174), (34, 635908), (52, 415786), (56, 386087), (68, 317954), (91, 237592), (104, 207893), (119, 181688), (136, 158977), (182, 118796), (221, 97832), (238, 90844), (364, 59398), (442, 48916), (476, 45422), (728, 29699), (884, 24458), (952, 22711), (1547, 13976), (1747, 12376), (1768, 12229), (3094, 6988), (3494, 6188)]