21000391755

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{241}}^1\times {\mathrm{691}}^1\times {\mathrm{1201}}^1$

素因数の和:2148

約数の個数: 64

約数和(自身を含む): 38648011776

約数和(自身を除く): 17647620021

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 241, 691, 723, 1201, 1205, 1687, 2073, 3455, 3603, 3615, 4837, 5061, 6005, 8407, 8435, 10365, 14511, 18015, 24185, 25221, 25305, 42035, 72555, 126105, 166531, 289441, 499593, 829891, 832655, 868323, 1165717, 1447205, 2026087, 2489673, 2497965, 3497151, 4149455, 4341615, 5809237, 5828585, 6078261, 10130435, 12448365, 17427711, 17485755, 29046185, 30391305, 87138555, 200003731, 600011193, 1000018655, 1400026117, 3000055965, 4200078351, 7000130585, 21000391755]

約数ペア:

[(1, 21000391755), (3, 7000130585), (5, 4200078351), (7, 3000055965), (15, 1400026117), (21, 1000018655), (35, 600011193), (105, 200003731), (241, 87138555), (691, 30391305), (723, 29046185), (1201, 17485755), (1205, 17427711), (1687, 12448365), (2073, 10130435), (3455, 6078261), (3603, 5828585), (3615, 5809237), (4837, 4341615), (5061, 4149455), (6005, 3497151), (8407, 2497965), (8435, 2489673), (10365, 2026087), (14511, 1447205), (18015, 1165717), (24185, 868323), (25221, 832655), (25305, 829891), (42035, 499593), (72555, 289441), (126105, 166531)]