19762780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1\times {\mathrm{167}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 42872256

約数和(自身を除く): 23109476

約数列:

[1, 2, 4, 5, 10, 20, 61, 97, 122, 167, 194, 244, 305, 334, 388, 485, 610, 668, 835, 970, 1220, 1670, 1940, 3340, 5917, 10187, 11834, 16199, 20374, 23668, 29585, 32398, 40748, 50935, 59170, 64796, 80995, 101870, 118340, 161990, 203740, 323980, 988139, 1976278, 3952556, 4940695, 9881390, 19762780]

約数ペア:

[(1, 19762780), (2, 9881390), (4, 4940695), (5, 3952556), (10, 1976278), (20, 988139), (61, 323980), (97, 203740), (122, 161990), (167, 118340), (194, 101870), (244, 80995), (305, 64796), (334, 59170), (388, 50935), (485, 40748), (610, 32398), (668, 29585), (835, 23668), (970, 20374), (1220, 16199), (1670, 11834), (1940, 10187), (3340, 5917)]