388486540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{4139}}^1$

素因数の和:4199

約数の個数: 72

約数和(自身を含む): 927475920

約数和(自身を除く): 538989380

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 361, 380, 494, 722, 988, 1235, 1444, 1805, 2470, 3610, 4139, 4693, 4940, 7220, 8278, 9386, 16556, 18772, 20695, 23465, 41390, 46930, 53807, 78641, 82780, 93860, 107614, 157282, 215228, 269035, 314564, 393205, 538070, 786410, 1022333, 1076140, 1494179, 1572820, 2044666, 2988358, 4089332, 5111665, 5976716, 7470895, 10223330, 14941790, 19424327, 20446660, 29883580, 38848654, 77697308, 97121635, 194243270, 388486540]

約数ペア:

[(1, 388486540), (2, 194243270), (4, 97121635), (5, 77697308), (10, 38848654), (13, 29883580), (19, 20446660), (20, 19424327), (26, 14941790), (38, 10223330), (52, 7470895), (65, 5976716), (76, 5111665), (95, 4089332), (130, 2988358), (190, 2044666), (247, 1572820), (260, 1494179), (361, 1076140), (380, 1022333), (494, 786410), (722, 538070), (988, 393205), (1235, 314564), (1444, 269035), (1805, 215228), (2470, 157282), (3610, 107614), (4139, 93860), (4693, 82780), (4940, 78641), (7220, 53807), (8278, 46930), (9386, 41390), (16556, 23465), (18772, 20695)]