1621840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1$

素因数の和:140

約数の個数: 80

約数和(自身を含む): 4374720

約数和(自身を除く): 2752880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 97, 110, 152, 176, 190, 194, 209, 220, 304, 380, 388, 418, 440, 485, 760, 776, 836, 880, 970, 1045, 1067, 1520, 1552, 1672, 1843, 1940, 2090, 2134, 3344, 3686, 3880, 4180, 4268, 5335, 7372, 7760, 8360, 8536, 9215, 10670, 14744, 16720, 17072, 18430, 20273, 21340, 29488, 36860, 40546, 42680, 73720, 81092, 85360, 101365, 147440, 162184, 202730, 324368, 405460, 810920, 1621840]

約数ペア:

[(1, 1621840), (2, 810920), (4, 405460), (5, 324368), (8, 202730), (10, 162184), (11, 147440), (16, 101365), (19, 85360), (20, 81092), (22, 73720), (38, 42680), (40, 40546), (44, 36860), (55, 29488), (76, 21340), (80, 20273), (88, 18430), (95, 17072), (97, 16720), (110, 14744), (152, 10670), (176, 9215), (190, 8536), (194, 8360), (209, 7760), (220, 7372), (304, 5335), (380, 4268), (388, 4180), (418, 3880), (440, 3686), (485, 3344), (760, 2134), (776, 2090), (836, 1940), (880, 1843), (970, 1672), (1045, 1552), (1067, 1520)]