217905820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{359}}^1$

素因数の和:499

約数の個数: 96

約数和(自身を含む): 522547200

約数和(自身を除く): 304641380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 89, 110, 124, 155, 178, 220, 310, 341, 356, 359, 445, 620, 682, 718, 890, 979, 1364, 1436, 1705, 1780, 1795, 1958, 2759, 3410, 3590, 3916, 3949, 4895, 5518, 6820, 7180, 7898, 9790, 11036, 11129, 13795, 15796, 19580, 19745, 22258, 27590, 30349, 31951, 39490, 44516, 55180, 55645, 60698, 63902, 78980, 111290, 121396, 122419, 127804, 151745, 159755, 222580, 244838, 303490, 319510, 351461, 489676, 606980, 612095, 639020, 702922, 990481, 1224190, 1405844, 1757305, 1980962, 2448380, 3514610, 3961924, 4952405, 7029220, 9904810, 10895291, 19809620, 21790582, 43581164, 54476455, 108952910, 217905820]

約数ペア:

[(1, 217905820), (2, 108952910), (4, 54476455), (5, 43581164), (10, 21790582), (11, 19809620), (20, 10895291), (22, 9904810), (31, 7029220), (44, 4952405), (55, 3961924), (62, 3514610), (89, 2448380), (110, 1980962), (124, 1757305), (155, 1405844), (178, 1224190), (220, 990481), (310, 702922), (341, 639020), (356, 612095), (359, 606980), (445, 489676), (620, 351461), (682, 319510), (718, 303490), (890, 244838), (979, 222580), (1364, 159755), (1436, 151745), (1705, 127804), (1780, 122419), (1795, 121396), (1958, 111290), (2759, 78980), (3410, 63902), (3590, 60698), (3916, 55645), (3949, 55180), (4895, 44516), (5518, 39490), (6820, 31951), (7180, 30349), (7898, 27590), (9790, 22258), (11036, 19745), (11129, 19580), (13795, 15796)]