1620228980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^2$

素因数の和:437

約数の個数: 72

約数和(自身を含む): 3548444760

約数和(自身を除く): 1928215780

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 89, 149, 164, 178, 205, 298, 356, 410, 445, 596, 745, 820, 890, 1490, 1780, 2980, 3649, 6109, 7298, 12218, 13261, 14596, 18245, 22201, 24436, 26522, 30545, 36490, 44402, 53044, 61090, 66305, 72980, 88804, 111005, 122180, 132610, 222010, 265220, 444020, 543701, 910241, 1087402, 1820482, 1975889, 2174804, 2718505, 3640964, 3951778, 4551205, 5437010, 7903556, 9102410, 9879445, 10874020, 18204820, 19758890, 39517780, 81011449, 162022898, 324045796, 405057245, 810114490, 1620228980]

約数ペア:

[(1, 1620228980), (2, 810114490), (4, 405057245), (5, 324045796), (10, 162022898), (20, 81011449), (41, 39517780), (82, 19758890), (89, 18204820), (149, 10874020), (164, 9879445), (178, 9102410), (205, 7903556), (298, 5437010), (356, 4551205), (410, 3951778), (445, 3640964), (596, 2718505), (745, 2174804), (820, 1975889), (890, 1820482), (1490, 1087402), (1780, 910241), (2980, 543701), (3649, 444020), (6109, 265220), (7298, 222010), (12218, 132610), (13261, 122180), (14596, 111005), (18245, 88804), (22201, 72980), (24436, 66305), (26522, 61090), (30545, 53044), (36490, 44402)]