21820140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{503}}^1$

素因数の和:759

約数の個数: 72

約数和(自身を含む): 66594528

約数和(自身を除く): 44774388

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 241, 482, 503, 723, 964, 1006, 1205, 1446, 1509, 2012, 2169, 2410, 2515, 2892, 3018, 3615, 4338, 4527, 4820, 5030, 6036, 7230, 7545, 8676, 9054, 10060, 10845, 14460, 15090, 18108, 21690, 22635, 30180, 43380, 45270, 90540, 121223, 242446, 363669, 484892, 606115, 727338, 1091007, 1212230, 1454676, 1818345, 2182014, 2424460, 3636690, 4364028, 5455035, 7273380, 10910070, 21820140]

約数ペア:

[(1, 21820140), (2, 10910070), (3, 7273380), (4, 5455035), (5, 4364028), (6, 3636690), (9, 2424460), (10, 2182014), (12, 1818345), (15, 1454676), (18, 1212230), (20, 1091007), (30, 727338), (36, 606115), (45, 484892), (60, 363669), (90, 242446), (180, 121223), (241, 90540), (482, 45270), (503, 43380), (723, 30180), (964, 22635), (1006, 21690), (1205, 18108), (1446, 15090), (1509, 14460), (2012, 10845), (2169, 10060), (2410, 9054), (2515, 8676), (2892, 7545), (3018, 7230), (3615, 6036), (4338, 5030), (4527, 4820)]