420980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 1053696

約数和(自身を除く): 632716

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 97, 124, 140, 155, 194, 217, 310, 388, 434, 485, 620, 679, 868, 970, 1085, 1358, 1940, 2170, 2716, 3007, 3395, 4340, 6014, 6790, 12028, 13580, 15035, 21049, 30070, 42098, 60140, 84196, 105245, 210490, 420980]

約数ペア:

[(1, 420980), (2, 210490), (4, 105245), (5, 84196), (7, 60140), (10, 42098), (14, 30070), (20, 21049), (28, 15035), (31, 13580), (35, 12028), (62, 6790), (70, 6014), (97, 4340), (124, 3395), (140, 3007), (155, 2716), (194, 2170), (217, 1940), (310, 1358), (388, 1085), (434, 970), (485, 868), (620, 679)]