19781701990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{8059}}^1\times {\mathrm{12919}}^1$

素因数の和:21004

約数の個数: 32

約数和(自身を含む): 37488672000

約数和(自身を除く): 17706970010

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 8059, 12919, 16118, 25838, 40295, 64595, 80590, 129190, 153121, 245461, 306242, 490922, 765605, 1227305, 1531210, 2454610, 104114221, 208228442, 520571105, 1041142210, 1978170199, 3956340398, 9890850995, 19781701990]

約数ペア:

[(1, 19781701990), (2, 9890850995), (5, 3956340398), (10, 1978170199), (19, 1041142210), (38, 520571105), (95, 208228442), (190, 104114221), (8059, 2454610), (12919, 1531210), (16118, 1227305), (25838, 765605), (40295, 490922), (64595, 306242), (80590, 245461), (129190, 153121)]